Woodworking machinery



June 12, 1923.

J. E. HHRST WOODWORKING MACHINERY 2 ShetS- -Sheet 1 Filed Jan. 22

1,45&411 111 June 12, 1923.

.1. E. HIRST WOODWORK ING MACHINERY 2 Sheets-Sheet 2 m 0 z e 2 Patented June 12, 1923.

entrain stares,

JAMES E. HIE-ST, OF CINCINNATI, OHIO, ASSIGNOR TO J. A. FAY & EGAN COMPANY,

l l d dli PATENT @FWQE.

OF CINCINNATI, OHIO, A CORPORATION OF WEST VIRGINIA.

WOODWORKING MACHINERY.

T 0 all whomit may concern:

Be it known that 1, JAMES E. l-lrns'r, a citizen of the United States, residing at Cincinnati, in the county of Hamilton and State of Ohio, have invented certain new and useful Improvements in oodworking Machinery, of which the following is a specification.

My invention relates to wood-workingmachinery, especially of that character provided with means for driving the cutterspindle by means of an electric motor.

Great difiicnlty had been experienced heretofore in driving cutter-spindles in wood-working machines direct by an electric motor in which the rotor was direct-connected with the cutter-spindle due to interference in the electric "force caused by yielding of that portion of the spindle to which the rotor was connected, and thereby disarranging the proper relation between the rotorand the stator of the electric motor.

It is the object of my invention to overcome these objections by novel means; further, to provide novel means whereby to secure the rotor of the electric motor direct to the cutter-spindle; and, further, to provide novel means whereby to maintain the rotor of the electric motor in axial line with the cutter-spindle and to maintain concentricity' of said rotating element with the stationary element of the electric motor concerned in producing the power effect in the electric motor.

It is the object of my invention, further, to provide a wood-working machine with a cutter-spindle having an overhanging end, and to secure the rotating;- element of the electric motor to this over-hanging end;

further, to provide novel means for supporting the outer portion of the overhanging' end of the cutter-spindle to maintain the rotating; element of the electric motor in its proper relation to the stationary element thereof complemental thereto; further, to provide a woodworking machine with a cutter-spindle jonrnaled in bearings so as to have an overhanging; end, and having the wood-cnttingz device secured to the spindle between said journals, and to provid-ethe overhanging; end of the cutter-spindle with the rotating; element of the electric motor and a steadying device for the outer portion of. the overhanging end of the cutter-spindle to maintain the rotating element of the motor in its proper path of rotation; further. to provide novel means for supporting the electric motor and the outer steadying de-v vice for the cutter-spindle bracketwise from the main frame of the wood-working machine; and, further, to provide novel adjusting means for the latter whereby to main tain the rotating parts in concentric relations.

The. invention will be further readily understood from the following description and claims, and from the drawings, in which latter:

Fig. 1 is'a side elevation of an exemplifying wood-working machine, represented as a so-called hand planer and jointer, having my improved device applied thereto.

Fig. 2 is a plan view of the same.

, Fig. 3 is an end elevation of the same, partly broken away, and showing a ditt'er ent term of steadying device from that shown in Figs. 1 and 2. 1

Fig. 4: is a vertical axial section, taken von the line 4;t of Fig. 2.

F 5 is an end elevation showing the bracket supporting and adjusting means, partly in section in the plane of the line 5 of Fig. 4, the body of the electric motor being removed. I i

Fig. 6 is a cross-section, taken on the line 66 of Fig. 2; and,

Fig. 7 is a sectional detail view, the plane of the line 7-7 of Fig. 5.

In the present exemplification of my invention, 1 show and describe a so-called hand planer and jointer as the wood-working machine of my invention,although it is taken in obvious that my invention is applicable to other wood-working machines in which a,

able "for properly holding the cutter-spindle against lateral vibration and end'wise move-' ment.

A wood-cuttingdevice, represented as critter-head 16, is secured to the cutter-spindie. The cutter-head is represented as a secalled solid cutter-head of substantiallycywedge-blocks 19 in the recesses and clampedtoward the cutter-"blades by means of wedg"- .lindrical form, in which cutter-blades 17 are suitably clamped in recesses 18, by means of bolts. 20. The cutter-head is fixed to the cutter-spindle by being received securely about the spindle and having rotative connection therewith, for instance by means of a key 21, and being clamped between a shoulder'22 on the cutter-spindle and a nut 23 threadedlover a threaded portion 24: of the cutter-spindle.

-, The wood-working machine is provided with suitable work-supporting tables '28, 29,

suitably fixedly or adjustably held on slides "30, 31,-adjustable along guides 32, 33, by

meansof hand-wheels 34, having suita "ble operative connection with said slides A side-gauge 38 for the work is suitably posi- "tioned and adjusted.

I The wood-cutting d'eviceis secured to the cutter-spindle between the bearings 14, 15, and the spindle is provided with an overhanging end 41, which is shown integral with the spindle. v

An electricmotor 43" comprises a motorframe l i, a stator 15, fixed'to themotordescribed as they are well known. The mo frame, and a rotor4=6 within the stator. The electric motor is shown of the induction motor type, in which the electric force or flux causes rotation of therotor by lnductionbe tween the stator and the rotor. The stator.

and the rotor are each provided with suitable windings for a motor of this character, which are not more particularly shown and ,torl is shown as a shaftlessmotor, that is to say, the rotor thereof is ,not mounted on a motor-shaft'having bearings in the motorframe, but is normally loose with relation to the motor-frame and the stator, and receives its support by being secured to the cutterspindle.

In Pr ctice, in a'motor of this character,

theouter periphery of the'rotor must be concentric with the inner periphery of the stator, and the peripheriesare in close relation having in practice approximately about sixteen thousandthsof an inch clearance be- I tween them, which clearance must be maintained for proper operation of the motor.

.If concentricity between the peripheries is not maintained, or if,due to the torque between the rotor and the cutter-head, there is adisarrangement of such concentricity, caus' ing eccentricity between the peripheries, or touching of one periphery with the other, there is a disturbance of the electric forces,

-ca'using loss of" ower or' stoppage of the rotor, and possib einjury to the motor.

I have provided novel means for maintaining such *co ncentricity and preventing eccentric relation between the outer periphery of the rotor and inner periphery ofthe' stator, for maintaining maximum-capacity 1n the electric motor, and preventing distortion or disarrangement between the rotor and the cutter-spindle.

I extend the cutter-spindle integral with the supporting portion thereof for the woods workin device to form an overhan in end and I mount the electric rotor of the electric motor on this overhanging end; For mount ing the rotor on the overhanging end, Iconstruct the overhanging end preferably of r taper form, andprovide the rotor with a sleeve 51, which hasa complemental 'taper bore 52. The overhanging portion of the cutter-spindle has 'a' threaded portion 53, over which-a nut 54: is threaded, for clamp-- ing the sleeve of the, rotor to the spindle, I

causing'the taper wall of the bore of the sleeve to be moved clampingly along the taper portion of the spindle, for firmly securing the same together and causing the rotor to be concentric onthe spindle.

I further provide means for holding the outer end of the spindle concentric with the portion thereof'which has the wood-cutting device thereon, and for maintainingv the outer end of the spindle in axial line with said cutter-carrying portion, and for preventing vibration of such outer end, where by the concentric arrangement between the rotor-and the stator of the electric motor,

when once established, is maintained.

I further provide means for positioning the stator ofthe electric motor concentric I} with relation to the cutter-spindle and for maintaining such concentricity.

Thus in the present exemplification the motor-frame comprises an end-wall 57 a body 58, shown as a stator supporting cyl inder,*and an outer end-wall 59. The motoris supported bracketwise from the machineframe, exemplified as I accomplished by means of-a bracket 61, securedto the ma chine-frame by bolts 62. The bracket is shown in the form ofa sector of a frustocone,and'provided with lugs 63, 64c, 65, in.

which adjusting bolts66, 67, 68, are thread- 7 tion to the bracket, the clamp-bolts being threaded into the bracket, and having wash-Y ers 82 between their heads and the lugs on the endwall 57. The holes 78 are larger thanthe shanks of the bolts to permit adjustments of said end-wall in all directions.

The body 58 of the motor is shown as a cylindrical casing for the stator, and has an annular tongue and rabbet connection 85 be tween it and the end-wall 57. The body and the endwall 57 are. clamped together by fthi tt h a-1 of bolts 86 e een said d wall and. said body, being threaded in lugs 8] in the body, for clamping the two together with said tongue and rabbet connection in con. centric seated relation.

T end-Wa 59 an h b dy f e motor have a concentric tongue and rabbet connection 91 between them, this end-wall being secured to the body by means of clamp: bolts 92 threaded into lugs 93 in the body, r mp g he end-wall to h ody, With he ene s an rah in c ncent c a ion-Y I Pre r to P ov e a s e dy hs Par b een h ute end f he o erhang ng e d of the cutter-spindle and the outer end of the motor-frame. This in F ig, 3 is shown as comp ising a s 01 which is cate n a bearing 102 in the end-Wall 59 ofrth motor-frame. Its. inner end is shown coni: cal at 103, received in a conical recess 104, in the outer end of the overhanging end of the cutter-spindle. A set-bolt 105 is threaded into the bearing 102, and clamps the stem n ax a p si n, e rQ l being apab e f x l m m nt for ma ntain ng J'Q hal lation between the conical faces, The stem is provided with an axial channel 106 With which a suitable oil-cup 107 connects, for oiling the journal between the stern and the outer end of the overhanging end ofthe cutter-spindle. i r

I e, in ig 1, and hown ehd teady eans f the erh g ng and of the. utteasp h as a; earing 1 1, this a ing ng sh wnh the end-wa l. 5,9

of the electric motor,

The ou e n of t o r ang n d f the cutter-spihdle is journaled in this hearing, This outer bearing is in axial line with the bearings 14, 15, of the cutter-spin-- die, between which the cutter-head is located, the rotor of the electric motor being located between the inner one of these last-named bearings and the outer bearing or steadying part mentioned.

he ut rpind e s thereby maintai ed u ax .11 hr ghout ts Wh le length an is p efer b y integr l hrough:

out and maintains concentric relations of rotation of the wood-cutting device or clitter-head and the rotor ofthe electric mo,- tor. i i

In practice, there is considerable resistance etween the wo du t ng d i e. and he. tor, when h roto is ta d, o vre h the ee ut ng vi e, ev n n; idle r lation, esulti g in a tende y t c use. a rque yi ld twist ng be we n th etc n W ed-c n e i and a lateral y ld of th r o i h rela n t e WQQd-Q l ng de ic due o the letr h erceih t eeh the stat r an the otor and th resist imev Of the Wood-cutting e ce, such endenc es Of yi ld and yi ds so takingpla e a ter t e ier ees. ii tetr -tin and "wh n they are subjected t0 the cutting strains of the woodscutting device.

I avoid all yields of the character mentioned by means of my improved device, and insure true axial andconcentric positions of all the related elements by means of the adjustments I have provided.

It is vdesirable at times to rotate the woodcutting device by hand, for instance, when giving attention to the cutting agencies, such as the cutter-blades 17. For providing convenience for such manual rotation, I provide a manual rotating device, shown as a handwheel 114C, and prefer to normally disconnect the rotative connection between said hand-wheel and the cutter-spindle, so that the handswheel may be normally in idle relation to-the cutter-spindle. This is accomplished in the present instance by mounting the handswheel on a stud 115 of the cutterpi d t, ow as a re uc d x e n of a d spindle, and securing a collar 116 to said stud, for instance, by means of a set-screw 117. The collar is provided with a hole 118 and the hand-wheel is provided with a pin 119, arranged to be received in said hole. A spring 120 between the collar and the hand-wheel normally separate the pin and its hole. If it is desired torotate the cutter-spindle by hand, the hand-wheel is pushed inwardly to connect the pin and hole, and the cutter-spindle is turned to the desired extent. When the. hand-wheel is released, the rotative connection between the hand-wheel and the cutter-spindle is automatically released. v 1

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is: I

1 In wood-working machinery, the combination of a machine-frame comprising a supporting portion for a cutter-spindle, an electric motor comprisinga motmr-frame, an outer stator and a rotor Withinsaid stator, a cutter-spindle, a plurality of bearings on said supporting portion of said machineframe for said cutter-spindle, said cutterspindle having an overhanging end integral therewith extending to overhang said bearings, meansfor securing said rotor to said overhanging end, complemental steadying ans betw sa d m tor-fr me n sa d v rhanging end of said cu rp n in line with "said first-named bearings for eady s said erhang ng e a ans or s curing said mo orr me acketwis to said a h netrai 15 .1 weed-wor ng ma h ne y, t omna ion of a machine-frame cmp is g a ppert hg Po tio for a cu t r-sp n le, n ectric meter compris ng a motor-f ame, n uter stat r fixed the to and a rotor mhlly lea e and rem vabl thin said n. a ohtterseih ie, a p u a ty Of hear ng n said s rpcr ihs portion of said machineframe for said cutter-spindle, said cutter spindle havingan overhanging endintegral therewith extending to overhangsaid bear-.v

ings, complemental steadying means be tween said motor-frame and the outer end of'said overhanging end oi said cutterspindle in line'with' said first-named bearmgs for steadylng said overhanging end,

vmeans for securing said rotor to said ov'ers hanging end between said jcomplemental steadymg means and one of? said bearings, means for securing said motor-trams bracketwise to said machine frame, and means for adjustingfisai'd motorira'me on said; Inachine-frame; a e a 3. In wood-working machinery, the com-i bination of a machine frame comprising a support ng port onfior a cutter-spindle, a

plurality of bearings thereonfor said cutter-spindle, an electric; motor comprising a motor-frame, an outer stato-r fixed to said motor-frame and a normally shaftless rotor arranged for rotation withi.n said stator,

an outer steadying part on said motor-irame for saidcutter-spindlo, said outer steadying part inline with said first-named bearings, a cutterspindle j ournaled in. .all said bear- I ings and having steadying'connection with said Steadying part, a wood-cutting device secured-to said cutter-spindle between said" bearings, and means for fixing said rotor to sa d cutter-spindle between said bearings and said steadying' part.

4. In wood-working machinery, the combination of a machine-framecomprising a supporting portion for a cu'tter-spi'ndle, a plurality of bearings'thereon for said outter-spindle, an electricmo-tor comprising a motor-drama an outer stator fixedto' said motor-frame g and a] rotor normally loose within said stator, an outer bearing in line with said first-named bearings, a cutter spindle journale'din all said bearings, a

wood-cutting device secured to'said cutterspindle between said first-named bearings, and means for fixing said. rotor to sa d outter-spindle between said first-named bearmgs and said outer bearing 5; In wood-workingmachinery, the combination of a machme-frame comprising a supporting portion forv a cutter-spindle, a plurality of bearings thereon for said out ter spindle, an electric motorcomprising a moto' r-framd an outer stator'fixed to said motor-frame and,,a rotor normally loose within said stator, an outer. bearing in line with said first-named bearings, a cutter-' spindle journaled in all said bearings, a

woodcutting device, secured tosaid cutter;

spindle between said first-namedbearings,

means for fixing said rotortosaid cutterspindle between said first-named bearings and said outer bearing, means for securing said motor-frame to said machine-frame,

and means foradjus'ting said outerbearing transversely with relation to said firstnamed bearings.

6. In wood-working machinery, the com with. said first named bearings, 'a'dcutten.

spindle journaled in all said bearings, a wood-cutt1ng devicesec'ured to said cuttersp ndle between sald first-named bearings,

means for fixing saidrotor to said, cutter-1 spindle between said first-named bearings and said outer bearing, and [adjustable means for securing said motor-frame bracketwise to said' mac'hineframe. i

7. In wood-working machinery, the combination of a machine-frame comprising a supporting portion for a cutterspindle, a plurallty of bearings thereon for said cutter-spindle, an electric motor comprising a motor-frame, a stator fixed thereto and a normally, shaftless rotor whose outer pe- 'ripheryis normally concentric and in close proximity within the inner periphery of.

said stator, a bearing on said motor-frame for the outer end of said Cutterspindle,

said first-named bearings and said secondnamed bearing being in line, with, each other, an integral cutter-spindle having journal connection withall said bearings,

a wood-cutting device fixed tofsaid icutterv spindle between said ,fi'rst named bearings, means for securing said rotorto said cuttere spindle between said first-named, bearings and sa d second-named bearing, securing sa1d motor-'Irame to said machineframe in overhanging relation to said machine-frame, and means for adjusting said I said first-named bearings 8. In wood-working Y'machmery, the

second-named bearing, for alinement with combination of a machine-frame comprising a supporting portion for a cutter-spindle, a plurality of bearings thereon for said cut-i tor-spindle, an electric'motor-comprising a motor-frame, a stator fixed-thereto and a means for normally shaftless rotor whose outer pe-I' riphery is normally concentric andin close proximity within the inner periphery of said stator, abearing on said motor-frame for the outer end of; said cutter-spindle, said first-named bearings and. said secondnamed bearing being 'in ,line. with each I other, an integral) cutter-spindle having journal connection with all said bearings,- a wood-cutting device-fixed to; said cutterspindle between said first-named bearings,

means for securing said rotor to said cue ter-sp'indle between said first-named bearingsand' saidsecond-named bearing, a \connecting, member for overhanginglysecur ing said motor-frame to said. machine-frame, means for securing said connecting member to said machine-frame, and adjusting means between said connecting member and said motor-frame for concentric positioning of said stator and said second-named bearing with relation to the axis of rotation of said cutter-spindle.

9. In wood-working machinery, the combination of a machine-frame, a cutterspindle journaled therein with an overhanging end, an electric motor comprising a motor-frame, a stator secured thereto and a normally shaftless rotor arranged for concentric rotation within said stator, a bracket on said machine-frame, adjusting means between said bracket and said motor-frame for adjusting said stator concentric about the axis of rotation of said cutter-spindle, and an outer steadying part on said bracket having steadying connection with said cutter-spindle.

10. In wood-working machinery, the combination of a machine-frame, a cutterspindle journaled therein with an overhang ing end, an electric motor comprising a motor-frame, a stator secured thereto and a normally shaftless rotor arranged for concentric rotation within said stator, said motor-frame comprising an outer end-wall, an outer bearing thereon for the outer portion of said overhanging end, and means for securing said motor-frame bracketwise to said machine-frame including means for adjusting said stator and said outer bearing concentric to the axial line of said cutterspindle when journaled in said machineframe.

11. In wood-Working machinery, the combination of a machine-frame, a cutterspindle journaled therein with an overhanging end, an electric motor comprising a motor-frame, a stator secured thereto and a normally shaftless rotor arranged for concentric rotation within said stator, said motor-frame comprising an outer end-wall, an outer bearing thereon for the outer portion of said overhanging end, means for securing said motor-frame bracketwise to said machine-frame including means for adjusting said stator and said outer bearing concentric to the axial line of said outter-spindle when journaled in said machineframe, and manual turning means for said cutter-spindle.

12. In wood-working machinery, the combination of a machine-frame, a cutterspindle journaled therein with an overhanging end, an electric motor comprising a motor-frame, a stator secured thereto and a normally shaftless rotor arranged for concentric rotation within said stator, said motor-frame comprising an outer end-wall, an outer bearing therein for the outer portion of said overhanging end, means for securing said motor-frame bracket-wise to said machine-frame including means for adjusting said stator and said outer bearing concentric to the axial line of said cutterspindle when journaled in said machineframe, manual turning means for said cutter-spindle, and releasable connecting means between said manual turning means and the outer end of said cutter spindle.

In testimony whereof, I have hereunto signed my name in the presence of two subscribing witnesses.

JAMES E. HIRST.

In presence of:

PAUL V. CoNNoLLY, DELMA WERNSING. 

